'jam...Yeah, they might be a little tight being new and all, but there is little bullet connectors in between esc and motor just pull towards front, the glue on the little esc "mounting" bracket was easy to break loose and slide forward....
Looking real close....is the blue wire stripped out of the motor?? or what is that shiny spot/tape?? on blue wire right at motor??? might just be me or reflection just looks odd.
BTW the ol' app goes really good with a 15 size motor, if that one is toast. I put a Cermark Neo-dym 15 in mine couple yrs ago, but yeah headsuprc is real good everything.